This is replying to Zhukov's initial post.
Because the end-time prophesies are an interest of mine, I have read literally dozens of books on the topic, and I would say that the answer to your question is that Islam (the Middle East countries) will be one of the major players ("king of the south") in this rampant anti-Christian era, along with Russia ("king of the north"), China ("king of the east"), and a federation of countries that made up the old Roman Empire, out of which the Anti Christ and his false trinity will come.
Recently I read on the internet or heard on a cable news talk show that radical Islam clerics teach in the mosques that the goal of Islam is to take care of the Saturday crowd first (the Jews), and the Sunday crowd (the Christians) afterwards. Prior to bin Laden and al Quada's entering the picture, they had been pretty successful in making the world believe that their hatred was only against the "Saturday crowd."